678 TREES OF NORTH AMERICA 



inner angle, subhorizontal; micropyle inferior. Fruit a woody ovoid, acuminate capsule 

 rounded at base, crowned with the subulate persistent style, septicidally 5-valved, 

 the valves 2-lobed at apex; outer coat thin, fleshy; inner coat woody. Seed solitary or in 

 pairs, ascending, subovoid, flattened; seed-coat subcoriaceous, papillate, produced below 

 into a subfalcate membranaceous wing; embryo surrounded by thin fleshy albumen, erect; 

 cotyledons oval, compressed; radicle very short, inferior. 



The genus is represented by a single species. 



The generic name is that by which this plant was known to the Mexicans of Arizona 

 at the time of its discovery. 



1. Canotia holacantha Torr. 



Leaves 0. Flowers |'-j' in diameter, appearing from June until October. Capsule 1' 

 long; seed about f in length. 



A small shrub-like tree, sometimes 20-30 high, with a short stout trunk rarely a foot 

 in diameter; or often a low spreading shrub. 



Fig. 61 1 



Distribution. Dry gravelly mesas on the Arizona foothills, from the White Mountain 

 region to the valley of Bill Williams's Fork in the northwestern part of the state, and on 

 Providence Mountain in southern California. 



4. GYMINDA Sarg. 



Trees or shrubs, with pale quadrangular branchlets and minute acuminate buds. Leaves 

 opposite, short-petiolate, oblong-obovate, rounded and sometimes emarginate at apex, 

 entire or remotely crenulate-serrate above the middle with revolute thickened margins, 

 feather- veined, coriaceous, persistent; stipules minute, acuminate, membranaceous, 

 caducous. Flowers unisexual, pedicellate, in axillary pedunculate few-flowered dichoto- 

 mously branched cymes bibracteolate at apex; calyx minute, 4-lobed, persistent, with a 

 short urceolate tube and rounded lobes; disk fleshy, filling the tube of the calyx, cup- 

 shaped, slightly 4-lobed; petals entire, obovate, white, rounded at apex, reflexed, much 

 longer than the lobes of the oalyx; stamens 4, opposite the sepals, inserted in the lobes of 

 the disk, exserted, in the pistillate flower; filaments slender, subulate, incurved; anthers 

 oblong; ovary 2-celled, oblong, sessile, confluent with the disk, crowned with a large 2-lobed 

 sessile stigma, rudimentary and deeply cleft in the staminate flower; ovule solitary, sus- 

 pended from the apex of the cell; raphe dorsal; micropyle superior. Fruit drupaceous, 

 fc-celled, 1 or 2-seeded, black or dark blue, oval or obovoid, crowned with the remnants of 



